Answer:
-4+(-9)
Step-by-step explanation:
You change the minus signs into and addition sign and make the number a negative.
Answer:
is that high school? cuz it looks like 8th or 7th grade
Answer:
<em>300 units</em>
Step-by-step explanation:
Answer:
23.6 (approximate value)
Step-by-step explanation:
- a*a+b*b=c*c Pythagorean thereom
- (21.5)^2 + b*b = (31.9)^2
- b*b= 1017.61 - 462.25
- √b*b= √555.36
- b=23.6(approximate value)
